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  <title>Flips an image using a given mode</title>

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</div><hr /><div id="function.imageflip" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">imageflip</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.5.0)</p><p class="refpurpose"><span class="refname">imageflip</span> &mdash; <span class="dc-title">Flips an image using a given mode</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.imageflip-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="type">bool</span> <span class="methodname"><strong>imageflip</strong></span>
    ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$image</code></span>
   , <span class="methodparam"><span class="type">int</span> <code class="parameter">$mode</code></span>
   )</div>

  <p class="para rdfs-comment">
   Flips the <em><code class="parameter">image</code></em> image using the given
   <em><code class="parameter">mode</code></em>. 
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.imageflip-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    <dt>
<em><code class="parameter">image</code></em></dt>

<dd>
<p class="para">由图象创建函数(例如<span class="function"><a href="function.imagecreatetruecolor.html" class="function">imagecreatetruecolor()</a></span>)返回的图象资源。</p></dd>

    
     <dt>
<em><code class="parameter">mode</code></em></dt>

     <dd>

      <p class="para">
       Flip mode, this can be one of the <strong><code>IMG_FLIP_*</code></strong> constants:
      </p>
      <p class="para">
       <table class="doctable informaltable">
        
         <thead>
          <tr>
           <th>Constant</th>
           <th>Meaning</th>
          </tr>

         </thead>

         <tbody class="tbody">
          <tr>
           <td><strong><code>IMG_FLIP_HORIZONTAL</code></strong></td>
           <td>
            Flips the image horizontally.
           </td>
          </tr>

          <tr>
           <td><strong><code>IMG_FLIP_VERTICAL</code></strong></td>
           <td>
            Flips the image vertically.
           </td>
          </tr>

          <tr>
           <td><strong><code>IMG_FLIP_BOTH</code></strong></td>
           <td>
            Flips the image both horizontally and vertically.
           </td>
          </tr>

         </tbody>
        
       </table>

      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.imageflip-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.imageflip-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-3163">
    <p><strong>Example #1 Flips an image vertically</strong></p>
    <div class="example-contents"><p>
     This example uses the <strong><code>IMG_FLIP_VERTICAL</code></strong> 
     constant.
    </p></div>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #FF8000">//&nbsp;File<br /></span><span style="color: #0000BB">$filename&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">'phplogo.png'</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">//&nbsp;Content&nbsp;type<br /></span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">'Content-type:&nbsp;image/png'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//&nbsp;Load<br /></span><span style="color: #0000BB">$im&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">imagecreatefrompng</span><span style="color: #007700">(</span><span style="color: #0000BB">$filename</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//&nbsp;Flip&nbsp;it&nbsp;vertically<br /></span><span style="color: #0000BB">imageflip</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">IMG_FLIP_VERTICAL</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//&nbsp;Output<br /></span><span style="color: #0000BB">imagejpeg</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagedestroy</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程的输出类似于：</p></div>
    <div class="mediaobject">
     
     <div class="imageobject">
      <img src="images/21009b70229598c6a80eef8b45bf282b-imageflipvertical.png" alt="Output of example: Vertically flipped image" width="120" height="67" />
     </div>
    </div>
   </div>
  </p>
  <p class="para">
   <div class="example" id="example-3164">
    <p><strong>Example #2 Flips the image horizontally</strong></p>
    <div class="example-contents"><p>
     This example uses the <strong><code>IMG_FLIP_HORIZONTAL</code></strong> constant.
    </p></div>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #FF8000">//&nbsp;File<br /></span><span style="color: #0000BB">$filename&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">'phplogo.png'</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">//&nbsp;Content&nbsp;type<br /></span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">'Content-type:&nbsp;image/png'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//&nbsp;Load<br /></span><span style="color: #0000BB">$im&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">imagecreatefrompng</span><span style="color: #007700">(</span><span style="color: #0000BB">$filename</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//&nbsp;Flip&nbsp;it&nbsp;horizontally<br /></span><span style="color: #0000BB">imageflip</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">IMG_FLIP_HORIZONTAL</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//&nbsp;Output<br /></span><span style="color: #0000BB">imagejpeg</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagedestroy</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程的输出类似于：</p></div>
    <div class="mediaobject">
     
     <div class="imageobject">
      <img src="images/21009b70229598c6a80eef8b45bf282b-imagefliphorizontal.png" alt="Output of example: Horizontally flipped image" width="120" height="67" />
     </div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 notes" id="refsect1-function.imageflip-notes">
  <h3 class="title">注释</h3>
  <blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">此函数仅在与 GD 库捆绑编译的 PHP 版本中可用。</span></p></blockquote>
 </div>

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